Home/ Manual/ spl / functions/ class_implements

class_implements

PHP function Edit on GitHub ✎

(PHP 5, PHP 7, PHP 8)

Return the interfaces which are implemented by the given class or interface

Description

class_implements(object|string $object_or_class, bool $autoload = true): array|false

This function returns an array with the names of the interfaces that the given object_or_class and its parents implement.

Parameters

object_or_class: An object (class instance) or a string (class or interface name).
autoload: Whether to autoload if not already loaded.

Return Values

An array on success, or false when the given class doesn't exist.

Examples

class_implements() example

php

<?php

interface foo { }
class bar implements foo {}

print_r(class_implements(new bar));

// you may also specify the parameter as a string
print_r(class_implements('bar'));

spl_autoload_register();

// use autoloading to load the 'not_loaded' class
print_r(class_implements('not_loaded', true));

?>

The above example will output something similar to:

output

Array
(
    [foo] => foo
)
Array
(
    [foo] => foo
)
Array
(
    [interface_of_not_loaded] => interface_of_not_loaded
)

Notes

Note

To check that an object implements an interface, Instanceof or the is_a() function should be used instead.